from los angeles, i am tavis smiley. tonight, a conversation with two of the founding members of tower of power. over the years, they have toured constantly and released more than 20 albums. their latest is called "hipper than hip." it features the or and section that defines their distinctive sound. tower ofation with power, coming up right now. >> and by contributions to your pbs station from viewers like you. thank you. asis: tower of power started . cover band they became the back bone of the driving mourn sound that came to define twoer of -- tower of power. their latest album is a double disc set called "hipper than hip." is is from the 40th anniversary cd. it's called "what is hip?" ♪ ♪ tavis: still sounding good, man. still sounding good. whatever happened to the bands with the great worn sections? >> were there that many? tavis: more than there are today. >> that's true. i guess they gave up. less music in the schools, there are fewer horn players coming out. guys want to play guitar and synthesizer. link --